NAME

       r3.timestamp  - Print/add/remove a timestamp for a 3D raster map

KEYWORDS

       raster3d, voxel

SYNOPSIS

       r3.timestamp
       r3.timestamp help
       r3.timestamp map=string  [date=timestamp]   [--verbose]  [--quiet]

   Parameters:
       map=string
           Input grid3 filename

       date=timestamp
           Datetime, datetime1/datetime2, or none

DESCRIPTION

       This  command  has 2 modes of operation. If no date argument is supplied, then the current
       timestamp for the 3D raster map is printed. If a date  argument  is  specified,  then  the
       timestamp for the 3D raster map is set to the specified date(s). See EXAMPLES below.

EXAMPLES

       r3.timestamp map=soils
       Prints  the  timestamp  for the "soils" 3D raster map. If there is no timestamp for soils,
       nothing is printed. If there is a timestamp, one or two lines are printed, depending on if
       the timestamp for the map consists of a single date or two dates (ie start and end dates).

       r3.timestamp map=soils date='15 sep 1987'
       Sets the timestamp for "soils" to the single date
       "15 sep 1987"

       r3.timestamp map=soils date='15 sep 1987/20 feb 1988'
       Sets the timestamp for "soils" to have the start date
       "15 sep 1987" and the end date "20 feb 1988"

       r3.timestamp map=soils date='18 feb 2005 10:30:00/20 jul 2007 20:30:00'
       Sets the timestamp for "soils" to have the start date
       "18 aug 2005 10:30:00" and the end date "20 jul 2007 20:30:00"

       r3.timestamp map=soils date=none
       Removes the timestamp for the "soils" 3D raster map

TIMESTAMP FORMAT

       The  timestamp values must use the format as described in the GRASS datetime library.  The
       source tree for this library should have a description of the format. For  convience,  the
       formats as of Feb, 1996 are reproduced here:

       There  are  two  types  of datetime values: absolute and relative. Absolute values specify
       exact dates and/or times.  Relative values specify a span of time. Some examples will help
       clarify:

       Absolute

       The general format for absolute values is

       day month year [bc] hour:minute:seconds timezone
       day is 1-31
       month is jan,feb,...,dec
       year is 4 digit year
       [bc] if present, indicates dates is BC
       hour is 0-23 (24 hour clock)
       minute is 0-59
       second is 0-59.9999 (fractions of second allowed)
       timezone is +hhmm or -hhmm (eg, -0600)
       parts can be missing
       1994 [bc]
       Jan 1994 [bc]
       15 jan 1000 [bc]
       15 jan 1994 [bc] 10 [+0000]
       15 jan 1994 [bc] 10:00 [+0100]
       15 jan 1994 [bc] 10:00:23.34 [-0500]
        Relative There are two types of relative datetime values, year- month and day-second.
       The formats are:

       [-] # years # months
       [-] # days # hours # minutes # seconds

       The words years, months, days, hours, minutes, seconds are literal words, and  the  #  are
       the numeric values.
       Examples:

       2 years
       5 months
       2 years 5 months
       100 days
       15 hours 25 minutes 35.34 seconds
       100 days 25 minutes
       1000 hours 35.34 seconds

       The  following  are illegal because it mixes year-month and day-second (because the number
       of days in a month or in a year vary):

       3 months 15 days
       3 years 10 days

BUGS

       Spaces in the timestamp value are required.

AUTHOR

       Michael Pelizzari
       Lockheed Martin Space Systems
       based on r.timestamp by Michael Shapiro,
       U.S. Army Construction Engineering Research Laboratory

       Last changed: $Date: 2012-01-28 12:54:52 -0800 (Sat, 28 Jan 2012) $

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